TextureCache: Move host texture utility functions to VideoCommon

The appropriate place for these would be AbstractTexture, once it is
finished.

2 files changed, 27 insertions, 0 deletions

diff --git a/Source/Core/VideoCommon/TextureCacheBase.cpp b/Source/Core/VideoCommon/TextureCacheBase.cpp
index e3a9daa69d..613f2dfed9 100644
--- a/Source/Core/VideoCommon/TextureCacheBase.cpp
+++ b/Source/Core/VideoCommon/TextureCacheBase.cpp
@@ -47,6 +47,29 @@ TextureCacheBase::TCacheEntryBase::~TCacheEntryBase()
 {
 }
 
+bool TextureCacheBase::IsCompressedHostTextureFormat(HostTextureFormat format)
+{
+  // This will need to be changed if we add any other uncompressed formats.
+  return format != HostTextureFormat::RGBA8;
+}
+
+size_t TextureCacheBase::CalculateHostTextureLevelPitch(HostTextureFormat format, u32 row_length)
+{
+  switch (format)
+  {
+  case HostTextureFormat::DXT1:
+    return static_cast<size_t>(std::max(1u, row_length / 4)) * 8;
+
+  case HostTextureFormat::DXT3:
+  case HostTextureFormat::DXT5:
+    return static_cast<size_t>(std::max(1u, row_length / 4)) * 16;
+
+  case HostTextureFormat::RGBA8:
+  default:
+    return static_cast<size_t>(row_length) * 4;
+  }
+}
+
 void TextureCacheBase::CheckTempSize(size_t required_size)
 {
   if (required_size <= temp_size)
diff --git a/Source/Core/VideoCommon/TextureCacheBase.h b/Source/Core/VideoCommon/TextureCacheBase.h
index f621f7d92a..7f2491a5c7 100644
--- a/Source/Core/VideoCommon/TextureCacheBase.h
+++ b/Source/Core/VideoCommon/TextureCacheBase.h
@@ -146,6 +146,10 @@ public:
 
   virtual ~TextureCacheBase();  // needs virtual for DX11 dtor
 
+  // TODO: Move these to AbstractTexture once it is finished.
+  static bool IsCompressedHostTextureFormat(HostTextureFormat format);
+  static size_t CalculateHostTextureLevelPitch(HostTextureFormat format, u32 row_length);
+
   void OnConfigChanged(VideoConfig& config);
 
   // Removes textures which aren't used for more than TEXTURE_KILL_THRESHOLD frames,